Finding the Third Proportional to 148.50 and 302.50

Step by Step Solution

1. Step 1: Write the proportion equation
   148.50 : 302.50 = 302.50 : x
2. Step 2: Convert to fraction form
   148.50/302.50 = 302.50/x
3. Step 3: Cross multiply
   148.50x = 302.50 × 302.50
4. Step 4: Simplify right side
   148.50x = 91,506.25
5. Step 5: Solve for x
   x = 91,506.25/148.50
6. Step 6: Final answer
   x = 616.20